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光纤通信系统中受到多径信道的相干多途作用,容易产生码间干扰,影响通信质量,需要进行码间干扰抑制,提出基于时间权重多径分量重组的光纤通信码间干扰抑制技术。利用抽头延迟线模型构建光纤通信信道模型,计算通信信道的冲激响应,在相干时间长度内对光纤通信信道的多径分量进行权重计算,实现信道的多径分量重组,使得光纤通信系信道的码间干扰多径分量以簇的形式在接收终端得到有效滤除,根据稀疏表示模型进行码间干扰抑制优化设计。仿真结果表明,该方法进行光纤通信系统的码间干扰抑制,具有较好的信道均衡效能,抑制多径信道的码间干扰,降低光纤通信的输出误码率,提高输出信噪比。
In the optical fiber communication system, the interference of multipath channels is multi-path, inter-symbol interference easily occurs, the quality of communication is affected, inter-symbol interference suppression is required. An inter-symbol interference suppression technology based on time-weighted multi-path components recombination is proposed. The fiber-optic communication channel model is constructed by using the tapped delay line model, the impulse response of the communication channel is calculated, and the multipath components of the fiber-optic communication channel are weighted in the coherence time length so that the multipath components of the channel are reorganized so that the channel of the optical fiber communication channel The inter-code interference multipath component is effectively filtered in the form of a cluster at the receiving terminal, and the intersymbol interference suppression is optimized according to the sparse representation model. The simulation results show that this method can suppress the intersymbol interference in the optical fiber communication system, has better channel equalization performance, restrain the intersymbol interference of the multipath channel, reduce the output error rate of the optical fiber communication, and improve the output signal-to-noise ratio.